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Retirement Plans (Tables) | 12 Months Ended
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Dec. 31, 2021
Compensation And Retirement Disclosure [Abstract] |
Schedule of Changes in Defined Benefit Plan Obligations |
|  | Pension Benefits |  |  | Postretirement Benefits |
|  | 2021 |  |  | 2020 |  |  | 2021 |  |  | 2020 |
Change in benefit obligation: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Benefit obligation at beginning of year |  | $ | 981 |  |  | $ | 924 |  |  | $ | 13 |  |  | $ | 14 |
Service cost |  |  | — |  |  |  | 5 |  |  |  | — |  |  |  | — |
Interest cost |  |  | 18 |  |  |  | 25 |  |  |  | — |  |  |  | — |
Actuarial loss (gain) |  |  | (18 | ) |  |  | 116 |  |  |  | (1 | ) |  |  | (1 | )
Plan amendments |  |  | — |  |  |  | 2 |  |  |  | 1 |  |  |  | — |
Plan curtailments |  |  | 22 |  |  |  | (14 | ) |  |  | — |  |  |  | 1 |
Plan settlements |  |  | (73 | ) |  |  | (28 | ) |  |  | — |  |  |  | — |
Participant contributions |  |  | — |  |  |  | — |  |  |  | 2 |  |  |  | 2 |
Benefits paid |  |  | (50 | ) |  |  | (49 | ) |  |  | (3 | ) |  |  | (3 | )
Benefit obligation at end of year |  |  | 880 |  |  |  | 981 |  |  |  | 12 |  |  |  | 13 |
Change in plan assets: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Fair value of plan assets at beginning of year |  |  | 745 |  |  |  | 694 |  |  |  | — |  |  |  | — |
Actual return on plan assets |  |  | (11 | ) |  |  | 114 |  |  |  | — |  |  |  | — |
Employer contributions |  |  | 60 |  |  |  | 14 |  |  |  | 1 |  |  |  | 1 |
Participant contributions |  |  | — |  |  |  | — |  |  |  | 2 |  |  |  | 2 |
Plan settlements |  |  | (73 | ) |  |  | (28 | ) |  |  | — |  |  |  | — |
Benefits paid |  |  | (50 | ) |  |  | (49 | ) |  |  | (3 | ) |  |  | (3 | )
Fair value of plan assets at end of year |  |  | 671 |  |  |  | 745 |  |  |  | — |  |  |  | — |
Funded status at end of year |  | $ | (209 | ) |  | $ | (236 | ) |  | $ | (12 | ) |  | $ | (13 | )
Amounts recognized in balance sheet: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Other long-term assets |  | $ | 6 |  |  | $ | 10 |  |  | $ | — |  |  | $ | — |
Other current liabilities |  |  | (14 | ) |  |  | (14 | ) |  |  | (2 | ) |  |  | (2 | )
Other long-term liabilities |  |  | (201 | ) |  |  | (232 | ) |  |  | (9 | ) |  |  | (11 | )
Net amount |  | $ | (209 | ) |  | $ | (236 | ) |  | $ | (11 | ) |  | $ | (13 | )
Amounts recognized in accumulated other comprehensive earnings: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Net actuarial loss (gain) |  | $ | 206 |  |  | $ | 201 |  |  | $ | (12 | ) |  | $ | (12 | )
Prior service cost |  |  | — |  |  |  | — |  |  |  | 1 |  |  |  | — |
Total |  | $ | 206 |  |  | $ | 201 |  |  | $ | (11 | ) |  | $ | (12 | )
Schedule of Projected Benefit Obligation And Accumulated Benefit Obligation in Excess of Plan Assets | Certain of Devon’s pension plans have a combined projected benefit obligation or accumulated benefit obligation in excess of plan assets at December 31, 2021 and December 31, 2020, as presented in the table below.
|  | December 31, |
|  | 2021 |  |  | 2020 |
Projected benefit obligation |  | $ | 215 |  |  | $ | 246 |
Accumulated benefit obligation |  | $ | 215 |  |  | $ | 246 |
Fair value of plan assets |  | $ | — |  |  | $ | — |
Schedule of Net Periodic Benefit Cost And Other Comprehensive Loss (Earnings) For Pension And Postretirement Benefit Plans |
|  | Pension Benefits |  |  | Postretirement Benefits |
|  | 2021 |  |  | 2020 |  |  | 2019 |  |  | 2021 |  |  | 2020 |  |  | 2019 |
Net periodic benefit cost: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Service cost |  | $ | — |  |  | $ | 5 |  |  | $ | 7 |  |  | $ | — |  |  | $ | — |  |  | $ | — |
Interest cost |  |  | 18 |  |  |  | 25 |  |  |  | 32 |  |  |  | — |  |  |  | — |  |  |  | — |
Expected return on plan assets |  |  | (34 | ) |  |  | (41 | ) |  |  | (38 | ) |  |  | — |  |  |  | — |  |  |  | — |
Recognition of net actuarial loss (gain) (1) |  |  | 4 |  |  |  | 5 |  |  |  | 7 |  |  |  | (1 | ) |  |  | — |  |  |  | (1 | )
Recognition of prior service cost (1) |  |  | — |  |  |  | 3 |  |  |  | 1 |  |  |  | — |  |  |  | (1 | ) |  |  | (1 | )
Total net periodic benefit cost (2) |  |  | (12 | ) |  |  | (3 | ) |  |  | 9 |  |  |  | (1 | ) |  |  | (1 | ) |  |  | (2 | )
Other comprehensive loss (earnings): |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Actuarial loss (gain) arising in current year |  |  | 28 |  |  |  | 27 |  |  |  | 7 |  |  |  | (1 | ) |  |  | (1 | ) |  |  | (2 | )
Prior service cost arising in current year |  |  | — |  |  |  | 2 |  |  |  | 3 |  |  |  | 1 |  |  |  | — |  |  |  | — |
Recognition of net actuarial gain (loss), including settlement expense, in net periodic benefit cost (3) |  |  | (23 | ) |  |  | (9 | ) |  |  | (22 | ) |  |  | 1 |  |  |  | 1 |  |  |  | 1 |
Recognition of prior service cost, including curtailment, in net periodic benefit cost (3) |  |  | — |  |  |  | (7 | ) |  |  | (2 | ) |  |  | — |  |  |  | 1 |  |  |  | 1 |
Total other comprehensive loss (earnings) |  |  | 5 |  |  |  | 13 |  |  |  | (14 | ) |  |  | 1 |  |  |  | 1 |  |  |  | — |
Total |  | $ | (7 | ) |  | $ | 10 |  |  | $ | (5 | ) |  | $ | — |  |  | $ | — |  |  | $ | (2 | )
(1) | These net periodic benefit costs were reclassified out of other comprehensive earnings in the current period.
(2) | The service cost component of net periodic benefit cost is included in G&A expense and the remaining components of net periodic benefit costs are included in other, net in the accompanying consolidated statements of comprehensive earnings.
(3) | These amounts include restructuring costs that were reclassified out of other comprehensive earnings in 2021, 2020 and 2019. See Note 6 for further discussion.
Schedule of Assumptions Used To Determine Benefit Obligations And Net Periodic Benefit Cost |
|  | Pension Benefits |  |  | Postretirement Benefits |
|  | 2021 |  |  | 2020 |  |  | 2019 |  |  | 2021 |  |  | 2020 |  |  | 2019 |
Assumptions to determine benefit obligations: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Discount rate |  | 2.71% |  |  | 2.38% |  |  | 3.14% |  |  | 2.34% |  |  | 1.82% |  |  | 2.81% |
Rate of compensation increase |  | N/A |  |  | 2.50% |  |  | 2.50% |  |  | N/A |  |  | N/A |  |  | N/A |
Assumptions to determine net periodic benefit cost: |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Discount rate - service cost |  | N/A |  |  | 3.47% |  |  | 3.74% |  |  | 2.51% |  |  | 3.25% |  |  | 3.99% |
Discount rate - interest cost |  | 2.11% |  |  | 2.75% |  |  | 3.36% |  |  | 1.01% |  |  | 2.31% |  |  | 3.21% |
Rate of compensation increase |  | N/A |  |  | 2.50% |  |  | 2.50% |  |  | N/A |  |  | N/A |  |  | N/A |
Expected return on plan assets |  | 5.00% |  |  | 6.00% |  |  | 5.75% |  |  | N/A |  |  | N/A |  |  | N/A |

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- Definition Tabular disclosure of the change in the benefit obligation, fair value of plan assets, and funded status of pension plans or other employee benefit plans. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (a)(b)(c) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of benefit obligation and plan assets of defined benefit plan with accumulated benefit obligation in excess of plan assets. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2417-114920 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=123447040&loc=d3e2417-114920 Reference 3: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=123450688&loc=d3e4179-114921 + Details
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